Electromagnetic environment effect testing device and method

Abstract

The invention provides an electromagnetic environment effect test method and device, and the method comprises the steps: obtaining the average receiving power of a boundary deformation period when a target electronic device is not placed in a boundary deformation reverberation chamber at each frequency, recording the average receiving power as first average receiving power, and recording the average receiving power as second average receiving power; acquiring the average receiving power of boundary deformation for one period when the target electronic equipment is put into the boundary deformation reverberation chamber, and recording the average receiving power as second average receiving power; calculating forward input power of the transmitting antenna based on the number of antenna placement positions, the first average receiving power and the second average receiving power; adjusting the output of the signal source based on the forward input power, enabling data monitored by a power meter in the electromagnetic environment effect testing device to be the same as the forward input power, and obtaining the corresponding state of the target electronic equipment in each deformation of the boundary deformation reverberation chamber; and calculating the probability of interference based on the state corresponding to each deformation. According to the invention, the probability that the electronic equipment is interfered by electromagnetic interference when working in a non-uniform electric field environment can be tested.

Description

Technical Field

[0001] The present application belongs to the technical field of equipment detection, and in particular, to an electromagnetic environment effect testing device and method. Background Art

[0002] The electrification and intelligence of equipment has gradually become a development trend. Intelligent electronic equipment will radiate electromagnetic waves to the outside world when in use. The large-scale use of electronic equipment has made the electromagnetic environment in space more and more complex and harsh. On the other hand, the complex and harsh electromagnetic environment greatly affects the performance indicators and function realization of electronic equipment. In order to evaluate whether the performance of electronic equipment is affected and the degree of the impact when working in an electromagnetic environment, it is necessary to carry out electromagnetic environment effect tests on electronic equipment. At present, the electromagnetic environment effect tests of electronic equipment are mainly carried out in open fields, anechoic chambers and other venues. The continuous wave electromagnetic environment specified in the standard is used to irradiate the electronic equipment, and the electromagnetic environment effect of the electronic equipment is judged according to the impact on the electronic equipment.

[0003] However, in the fields of aircraft, ships, satellites, rockets, etc., a variety of electronic equipment is in some form of large-scale cavity. Due to the multiple refraction and reflection of electromagnetic waves by the cavity boundary, a complex electromagnetic environment with uneven distribution and great differences in field strength is formed in the cavity. In addition, the electromagnetic response inside the cavity is very sensitive to the cavity geometry and loading position. A small structural change, such as a change in the position of the cable, will cause a drastic change in the distribution of the cavity's electromagnetic environment. Therefore, the electromagnetic environment effect of electronic equipment working in this environment is closely related to the electric field strength at the location. Whether an electronic device has an electromagnetic environment effect is related to many factors and is an uncertain quantity. Summary of the invention

[0004] The embodiments of the present application provide an electromagnetic environment effect testing device and method to provide the probability that an electronic device is subject to electromagnetic interference, thereby meeting the electromagnetic environment effect evaluation and testing requirements in a cavity environment.

[0005] This application is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an electromagnetic environment effect testing method, comprising:

[0007] At each frequency, the average received power of one period of boundary deformation of the target electronic device when it is not placed in the boundary deformation reverberation chamber is obtained and recorded as the first average received power.

[0008] At each frequency, the average received power of one period of boundary deformation when the target electronic device is placed in the boundary deformation reverberation chamber is obtained and recorded as the second average received power.

[0009] The loading factor at each frequency is calculated based on the number of antenna placement positions, the first average received power, and the second average received power.

[0010] Calculate the forward input power to the transmit antenna based on the loading factor at each frequency.

[0011] The output of the signal source is adjusted based on the forward input power so that the data monitored by the power meter in the electromagnetic environment effect testing device is the same as the forward input power.

[0012] After adjusting the output of the signal source based on the forward input power, the state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber is obtained.

[0013] Based on the state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber, the probability of being interfered is calculated.

[0014] In combination with the first aspect, in some possible implementations, calculating a loading factor at each frequency based on the number of antenna placement positions, the first average received power, and the second average received power includes:

[0015] Based on the number of antenna placement positions, the first average received power and the second average received power, the loading factor at each frequency is calculated in combination with the first formula.

[0016] The first formula is:

[0017]

[0018] Among them, CLF f represents the loading factor at frequency f, CCF f ACF is the cavity calibration factor at frequency f. f represents the receive antenna calibration factor at frequency f, The first average received power P of n antenna placement positions at frequency f is i The sum of , i = 1, 2, 3, 4...n, The second average received power P of n antenna placement positions at frequency f is i The sum of ', i = 1, 2, 3, 4...n.

[0019] In combination with the first aspect, in some possible implementations, calculating the forward input power of the transmitting antenna based on the loading factor at each frequency includes:

[0020] Based on the loading factor at each frequency, combined with the second formula, the forward input power is calculated.

[0021] The second formula is:

[0022]

[0023] Among them, P Input represents the forward input power, represents the average value of the normalized field strength at n antenna placement positions during the calibration of the boundary deformation reverberation chamber, CLF(f) represents the function of the loading factor with respect to frequency, and E test represents the expected electric field strength in a boundary-deformed reverberation chamber.

[0024] In combination with the first aspect, in some possible implementations, calculating the probability of being disturbed based on the state of the electronic device corresponding to each deformation of the boundary deformation reverberation chamber includes:

[0025] Based on the state of the electronic device corresponding to each deformation in the boundary deformation reverberation chamber, combined with the third formula, the probability of being interfered is calculated.

[0026] The third formula is:

[0027]

[0028] Among them, P C represents the probability of interference, N S It indicates that the state corresponding to each deformation of the boundary deformation reverberation chamber of the target electronic device is the number of times it is disturbed, and N indicates the total number of deformations of the boundary deformation reverberation chamber.

[0029] In the second aspect, an embodiment of the present application provides an electromagnetic environment effect testing device, including: a boundary deformation reverberation chamber, a transmitting antenna, a field strength meter, a signal source, a power meter, a power amplifier, a directional coupler, a host computer, a controller, a stepper motor, a linkage device, a performance monitoring module, a photoelectric conversion module and an electro-optical conversion module.

[0030] The host computer is connected to the performance monitoring module, the controller, the field strength meter, the power meter and the signal source respectively; the signal source is also connected to the power amplifier, the power amplifier is also connected to the directional coupler, the directional coupler is also connected to the power meter and the transmitting antenna; the performance monitoring module is also connected to the photoelectric conversion module, the photoelectric conversion module is connected to the electro-optical conversion module, the electro-optical conversion module is connected to the target electronic device; the controller is connected to the stepper motor; the stepper motor is connected to the linkage device; the linkage device is connected to the boundary deformation reverberation chamber.

[0031] The host computer is used to control the output of the signal source online, control the movement of the stepper motor through the controller, display and store the monitoring data of the power meter and field strength meter online, and display the performance status of the target electronic equipment in real time online.

[0032] The transmitting antenna is placed at any corner inside the boundary deformation reverberation chamber, and the transmitting antenna points to a corner of the boundary deformation reverberation chamber that is closest to the transmitting antenna.

[0033] Signal source, used to generate the signal required for electromagnetic environment effect testing.

[0034] The power amplifier is used to amplify the power of the signal generated by the signal source.

[0035] Directional coupler to provide a test port for monitoring the power on the cable between the power amplifier and the transmit antenna.

[0036] The power meter is used to measure the forward input power transmitted by the power amplifier to the transmitting antenna, and to measure the backward power reflected back from the transmitting antenna.

[0037] The field strength meter is used to monitor the changes in the electric field in the boundary deformation reverberation room space during the electromagnetic environment effect test.

[0038] The electro-optical conversion module is used to convert the electrical signal output by the target electronic device into an optical signal.

[0039] The photoelectric conversion module is used to convert the optical signal generated by the electro-optical conversion module into an electrical signal and input it into the performance monitoring module.

[0040] The stepper motor drives the linkage device to deform the boundary deformation reverberation chamber.

[0041] In conjunction with the second aspect, in some possible implementations, the device further includes: a medium test bench.

[0042] The dielectric test bench is used to place the target electronic equipment; wherein the distance between the target electronic equipment and the ground is not less than 1 / 4 of the wavelength corresponding to the test frequency.

[0043] In combination with the second aspect, in some possible implementations, the linkage device includes a connecting rod, a sliding block, and a guide rail.

[0044] One end of the connecting rod is fixedly connected to the outer surface of the boundary deformation reverberation chamber; the other end of the connecting rod is fixedly connected to the sliding block.

[0045] The slide block is slidably arranged on the guide rail.

[0046] The stepper motor is connected to the slider and drives the slider to perform reciprocating motion on the guide rail according to the control signal of the controller.

[0047] In combination with the second aspect, in some possible implementations, the electromagnetic environment effect testing device further includes: a power supply module.

[0048] The power module is connected to the controller and the stepper motor respectively, and is used for supplying power to the controller and the stepper motor.

[0049] In conjunction with the second aspect, in some possible implementations, the photoelectric conversion module and the electro-optical conversion module are connected via an optical fiber; and the host computer is connected to the field intensity meter via the optical fiber.

[0050] In combination with the second aspect, in some possible implementations, the transmitting antenna is a log-periodic antenna, a Yagi antenna, or a horn antenna.

[0051] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0052] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0053] This application calculates the loading factor at each frequency based on the number of antenna placement positions, the average received power of one cycle of boundary deformation when the target electronic device is not placed in the boundary deformation reverberation chamber, and the average received power of one cycle of boundary deformation when the target electronic device is placed in the boundary deformation reverberation chamber, and calculates the forward input power of the transmitting antenna, and adjusts the output of the signal source according to the forward input power, so that the data monitored by the power meter in the electromagnetic environment effect test device is the same as the forward input power, and then obtains the state corresponding to each deformation of the target electronic device in the boundary deformation reverberation chamber, and finally calculates the probability of the target electronic device being interfered according to the state corresponding to each deformation of the target electronic device in the boundary deformation reverberation chamber. It can calculate the probability of the target electronic device being subjected to electromagnetic interference when working in a non-uniform electric field environment, so that the results of the electrical environment effect test are closer to the actual situation, and accurately determine whether the target electronic device meets the subsequent use requirements.

[0054] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 It is a flowchart of an electromagnetic environment effect testing method provided in one embodiment of the present application;

[0057] Figure 2 It is a structural schematic diagram of an electromagnetic environment effect testing device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0058] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0059] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0060] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0061] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0062] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0063] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0064] The present application provides a method for testing electromagnetic environment effects. Figure 1is a schematic diagram of the process of the electromagnetic environment effect testing method provided by an embodiment of the present application, referring to Figure 1 , the electromagnetic environment effect test method is described in detail as follows:

[0065] Step 101 : At each frequency, the average received power of a boundary deformation cycle of the target electronic device when the target electronic device is not placed in the boundary deformation reverberation chamber is obtained, and recorded as the first average received power.

[0066] Step 102 : At each frequency, the average received power of a boundary deformation cycle of the target electronic device when it is placed in the boundary deformation reverberation chamber is obtained, and recorded as the second average received power.

[0067] Step 103, calculating a loading factor at each frequency based on the number of antenna placement positions, the first average received power, and the second average received power.

[0068] Exemplarily, step 103 may include:

[0069] Based on the number of antenna placement positions, the first average received power and the second average received power, the loading factor at each frequency is calculated in combination with the first formula.

[0070] The first formula is:

[0071]

[0072] Among them, CLF f represents the loading factor at frequency f, CCF f ACF is the cavity calibration factor at frequency f. f represents the receive antenna calibration factor at frequency f, The first average received power P of n antenna placement positions at frequency f is i The sum of , i = 1, 2, 3, 4...n, The second average received power P of n antenna placement positions at frequency f is i The sum of ', i = 1, 2, 3, 4...n.

[0073] Step 104: Calculate the forward input power of the transmitting antenna based on the loading factor at each frequency.

[0074] Exemplarily, step 104 may include:

[0075] Based on the loading factor at each frequency, combined with the second formula, the forward input power is calculated.

[0076] The second formula is:

[0077]

[0078] Among them, P Input represents the forward input power, represents the average value of the normalized field strength at n antenna placement positions during the calibration of the boundary deformation reverberation chamber, CLF(f) represents the function of the loading factor with respect to frequency, and E test represents the expected electric field strength in a boundary-deformed reverberation chamber.

[0079] Step 105, adjusting the output of the signal source based on the forward input power so that the data monitored by the power meter in the electromagnetic environment effect testing device is the same as the forward input power.

[0080] Step 106 , after adjusting the output of the signal source based on the forward input power, obtaining a state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber.

[0081] Step 107: Calculate the probability of being interfered based on the state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber.

[0082] Exemplarily, step 107 may include:

[0083] Based on the state of the electronic device corresponding to each deformation in the boundary deformation reverberation chamber, combined with the third formula, the probability of being interfered is calculated.

[0084] The third formula is:

[0085]

[0086] Among them, P C represents the probability of interference, N S It indicates that the state corresponding to each deformation of the boundary deformation reverberation chamber of the target electronic device is the number of times it is disturbed, and N indicates the total number of deformations of the boundary deformation reverberation chamber.

[0087] The above electromagnetic environment effect test method calculates the loading factor at each frequency according to the number of antenna placement positions, the average received power of one cycle of boundary deformation when the target electronic device is not placed in the boundary deformation reverberation chamber, and the average received power of one cycle of boundary deformation when the target electronic device is placed in the boundary deformation reverberation chamber, and calculates the forward input power of the transmitting antenna, and adjusts the output of the signal source according to the forward input power, so that the data monitored by the power meter in the electromagnetic environment effect test device is the same as the forward input power, and then obtains the state corresponding to each deformation of the target electronic device in the boundary deformation reverberation chamber, and finally calculates the probability of the target electronic device being interfered according to the state corresponding to each deformation of the target electronic device in the boundary deformation reverberation chamber. It can calculate the probability of the target electronic device being subjected to electromagnetic interference when working in a non-uniform electric field environment, so that the results of the electrical environment effect test are closer to the actual situation, and accurately determine whether the target electronic device meets the subsequent use requirements.

[0088] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0089] Corresponding to the electromagnetic environment effect testing method described in the above embodiment, Figure 2 A structural block diagram of an electromagnetic environment effect testing device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0090] See also Figure 2 The electromagnetic environment effect testing device in the embodiment of the present application may include: a boundary deformation reverberation chamber 101, a transmitting antenna 102, a field strength meter 103, a signal source 104, a power meter 105, a power amplifier 106, a directional coupler 107, a host computer 108, a controller 109, a stepping motor 110, a linkage device 111, a performance monitoring module 112, a photoelectric conversion module 113 and an electro-optical conversion module 114.

[0091] The host computer 108 is connected to the performance monitoring module 112, the controller 109, the field strength meter 103, the power meter 105 and the signal source 104 respectively; the signal source 104 is also connected to the power amplifier 106, the power amplifier 106 is also connected to the directional coupler 107, the directional coupler 107 is also connected to the power meter 105 and the transmitting antenna 102; the performance monitoring module 112 is also connected to the photoelectric conversion module 113, the photoelectric conversion module 113 is connected to the electro-optical conversion module 114, and the electro-optical conversion module 114 is connected to the target electronic device; the controller 109 is connected to the stepper motor 110; the stepper motor 110 is connected to the linkage device 111; the linkage device 111 is connected to the boundary deformation reverberation chamber 101.

[0092] The host computer 108 is used to control the output of the signal source 104 online, control the movement of the stepper motor 110 through the controller 109, display and store the monitoring data of the power meter 105 and the field strength meter 103 online, and display the performance status of the target electronic device online in real time.

[0093] The transmitting antenna 102 is placed at any corner inside the boundary deformation reverberation chamber 101 , and the transmitting antenna 102 points to a corner of the boundary deformation reverberation chamber 101 that is closest to the transmitting antenna 102 .

[0094] The signal source 104 is used to generate the signal required for the electromagnetic environment effect test.

[0095] The power amplifier 106 is used to amplify the power of the signal generated by the signal source 104 .

[0096] The directional coupler 107 is used to provide a test port for monitoring the power on the cable between the power amplifier 106 and the transmitting antenna 102 .

[0097] The power meter 105 is used to measure the forward input power transmitted from the power amplifier 106 to the transmitting antenna 102 , and to measure the backward power reflected from the transmitting antenna 102 .

[0098] The field strength meter 103 is used to monitor the change of the electric field in the space of the boundary deformation reverberation chamber 101 during the electromagnetic environment effect test.

[0099] The electrical-to-optical conversion module 114 is used to convert the electrical signal output by the target electronic device into an optical signal.

[0100] The photoelectric conversion module 113 is used to convert the optical signal generated by the electro-optical conversion module 114 into an electrical signal and input the electrical signal into the performance monitoring module 112 .

[0101] The stepping motor 110 drives the linkage device 111 to deform the boundary deformation reverberation chamber 101 .

[0102] Specifically, the boundary deformation reverberation chamber 101 is used as a spatial electric field forming device, which greatly reduces the cost of the test system compared with the traditional mechanical stirring reverberation chamber. The host computer 108 is used to control the test process online, so as to realize the automation of the test system and improve the test efficiency. The stepper motor 110 is used to control the linkage device 111 to control the boundary position of the reverberation chamber 101, so that the electric field distribution inside the boundary deformation reverberation chamber 101 can be in a continuous disturbance state and a discrete disturbance state respectively, so as to realize the mode stirring and mode tuning functions of the boundary deformation reverberation chamber 101.

[0103] Specifically, under the action of electromagnetic radiation, the key parameter signal of the target electronic device is converted into an optical signal by the electro-optical conversion module 114 to avoid the influence of external electromagnetic radiation on the monitoring accuracy during the signal transmission process. The optical signal is converted into an electrical signal by the photoelectric conversion module 113 outside the boundary deformation reverberation chamber 101, and then transmitted to the performance monitoring module 112, and the performance monitoring module 112 is used to monitor whether the target electronic device has an electromagnetic effect. Among them, since the field distribution in the boundary deformation reverberation chamber 101 (VIRC) is statistically uniform rather than real-time uniform, there are interference effects on the test electronic devices at some deformation positions, and no interference effects on the test electronic devices at other deformation positions.

[0104] Exemplarily, the material of the boundary deformation reverberation chamber 101 is shielding cloth, and the shielding effectiveness of the shielding cloth is greater than or equal to 50 dB. Furthermore, the material of the shielding cloth is silver fiber or copper-nickel fiber.

[0105] Exemplarily, the device further includes: a medium test bench.

[0106] The dielectric test bench is used to place the target electronic equipment; wherein the distance between the target electronic equipment and the ground is not less than 1 / 4 of the wavelength corresponding to the test frequency.

[0107] Exemplarily, the linkage device 111 includes a connecting rod, a sliding block and a guide rail.

[0108] One end of the connecting rod is fixedly connected to the outer surface of the boundary deformation reverberation chamber; the other end of the connecting rod is fixedly connected to the sliding block.

[0109] The slide block is slidably arranged on the guide rail.

[0110] The stepper motor 110 is connected to the slider, and drives the slider to perform reciprocating motion on the guide rail according to the control signal of the controller 109 .

[0111] Exemplarily, the electromagnetic environment effect testing device further includes: a power supply module 115 .

[0112] The power module 115 is connected to the controller 109 and the stepper motor 110 respectively, and is used to supply power to the controller 109 and the stepper motor 110 .

[0113] Exemplarily, the photoelectric conversion module 113 and the electro-optical conversion module 114 are connected via optical fiber; the host computer 108 is connected to the field intensity meter 103 via optical fiber.

[0114] Specifically, an electro-optical conversion module 114 and a photoelectric conversion module 113 are used between the performance monitoring module 112 and the target electronic device, and the connecting cables in the boundary deformation reverberation chamber 101 are changed from coaxial cables to optical fibers, thereby avoiding interference introduced by the test cables during the effect monitoring process and ensuring the accuracy of the effect monitoring results.

[0115] Exemplarily, the transmitting antenna 102 is a log-periodic antenna, a Yagi antenna, or a horn antenna.

[0116] In order to better understand the present solution, in some specific embodiments, the electromagnetic environment effect process of the electronic equipment specifically includes:

[0117] 1. Construct an electromagnetic environment effect test device for electronic equipment based on a boundary deformation reverberation chamber.

[0118] 2. Select a data processing circuit board as the electronic device under test, and place the tested data processing circuit board on the dielectric test bench in the middle area of ​​the boundary deformation reverberation chamber (VIRC), more than 1 meter away from the boundary of the boundary deformation reverberation chamber (VIRC) and the antenna. Make the tested data processing circuit board in normal working condition.

[0119] 3. Carry out the loading factor test of the test data processing circuit board in the boundary deformation reverberation chamber (VIRC). Carry out the test according to step 1) of the effect test method. When the frequency is f1, the test result is 0.95.

[0120] 4. Calculate the forward input power required for the effect test. The electric field strength required for the test is 50V / m, and the normalized electric field strength of the boundary deformation reverberation chamber (VIRC) at frequency f1 is 85V / m. After calculation, the forward input power is 23.4dBm.

[0121] 5. Adjust the output amplitude of the signal source and the gain of the power amplifier respectively to ensure that the forward input power monitored by the forward power meter is 23.4dBm.

[0122] 6. Keep the signal output and power amplifier gain unchanged, test and record the effect of the electronic equipment under test at each boundary deformation of the boundary deformation reverberation chamber (VIRC), as shown in Table 1.

[0123] Table 1 The electromagnetic environment effects of a data processing circuit board under the irradiation of f1 frequency electromagnetic waves.

[0124]

[0125]

[0126] 7. According to the third formula, the probability of a data processing circuit board experiencing electromagnetic environment effects under the irradiation of f1 frequency electromagnetic waves is calculated to be: 10÷12=83.33%.

[0127] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0128] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0129] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0130] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0131] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0132] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for testing electromagnetic environment effects, characterized in that: include: At each frequency, the average received power of the target electronic device during one period of boundary deformation when the target electronic device is not placed in the boundary deformation reverberation chamber is obtained, and recorded as the first average received power; At each frequency, the average received power of the target electronic device during one period of boundary deformation when it is placed in the boundary deformation reverberation chamber is obtained, and recorded as the second average received power; Calculate a loading factor at each frequency based on the number of antenna placement positions, the first average received power, and the second average received power; Calculating the forward input power of the transmitting antenna based on the loading factor at each frequency; adjusting the output of the signal source based on the forward input power so that the data monitored by the power meter in the electromagnetic environment effect testing device is the same as the forward input power; After adjusting the output of the signal source based on the forward input power, obtaining a state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber; Based on the state of the target electronic device corresponding to each deformation of the boundary deformation reverberation chamber, the probability of being interfered is calculated.

2. The electromagnetic environment effect testing method according to claim 1, characterized in that: The calculating the loading factor at each frequency based on the number of antenna placement positions, the first average received power, and the second average received power includes: Calculate the loading factor at each frequency based on the number of antenna placement positions, the first average received power, and the second average received power in combination with the first formula; The first formula is: Among them, CLF f represents the loading factor at frequency f, CCF f ACF is the cavity calibration factor at frequency f. f represents the receive antenna calibration factor at frequency f, The first average received power P of n antenna placement positions at frequency f is i The sum of , i = 1, 2, 3, 4...n, The second average received power P of n antenna placement positions at frequency f is i The sum of ', i = 1, 2, 3, 4...n.

3. The electromagnetic environment effect testing method according to claim 1, characterized in that: The calculating the forward input power of the transmitting antenna based on the loading factor at each frequency includes: The forward input power is calculated based on the loading factor at each frequency in combination with the second formula; The second formula is: Among them, P Input represents the forward input power, represents the average value of the normalized field strength at n antenna placement positions during the calibration of the boundary deformation reverberation chamber, CLF(f) represents the function of the loading factor with respect to frequency, and E test represents the expected electric field strength in a boundary-deformed reverberation chamber.

4. The electromagnetic environment effect testing method according to claim 1, characterized in that: The calculating the probability of being disturbed based on the state of the electronic device corresponding to each deformation in the boundary deformation reverberation chamber includes: The probability of being disturbed is calculated based on the state of the electronic device corresponding to each deformation of the boundary deformation reverberation chamber in combination with the third formula; The third formula is: Among them, P C represents the probability of interference, N S It indicates that the state corresponding to each deformation of the boundary deformation reverberation chamber of the target electronic device is the number of times it is disturbed, and N indicates the total number of deformations of the boundary deformation reverberation chamber.

5. An electromagnetic environment effect testing device, characterized in that: include: Boundary deformation reverberation chamber, transmitting antenna, field strength meter, signal source, power meter, power amplifier, directional coupler, host computer, controller, stepper motor, linkage device, performance monitoring module, photoelectric conversion module and electro-optical conversion module; The host computer is connected to the performance monitoring module, the controller, the field intensity meter, the power meter and the signal source respectively; the signal source is also connected to the power amplifier, the power amplifier is also connected to the directional coupler, the directional coupler is also connected to the power meter and the transmitting antenna; the performance monitoring module is also connected to the photoelectric conversion module, the photoelectric conversion module is connected to the electro-optical conversion module, and the electro-optical conversion module is connected to the target electronic device; the controller is connected to the stepping motor; the stepping motor is connected to the linkage device; the linkage device is connected to the boundary deformation reverberation chamber; The host computer is used to control the output of the signal source online, control the movement of the stepper motor through the controller, display and store the monitoring data of the power meter and the field strength meter online, and display the performance status of the target electronic device online in real time; The transmitting antenna is placed at any corner of the boundary deformation reverberation chamber, and the transmitting antenna points to a corner of the boundary deformation reverberation chamber that is closest to the transmitting antenna; The signal source is used to generate the signal required for the electromagnetic environment effect test; The power amplifier is used to amplify the power of the signal generated by the signal source; The directional coupler is used to provide a test port for monitoring the power on the cable between the power amplifier and the transmitting antenna; The power meter is used to measure the forward input power transmitted by the power amplifier to the transmitting antenna, and to measure the backward power reflected from the transmitting antenna; The field strength meter is used to monitor the changes in the electric field in the boundary deformation reverberation chamber during the electromagnetic environment effect test; The electro-optical conversion module is used to convert the electrical signal output by the target electronic device into an optical signal; The photoelectric conversion module is used to convert the optical signal generated by the electro-optical conversion module into an electrical signal and input it into the performance monitoring module; The stepping motor drives the linkage device to cause the boundary deformation reverberation chamber to deform.

6. The electromagnetic environment effect testing device according to claim 5, characterized in that: The device also includes: a medium test bench; The dielectric test bench is used to place the target electronic device; wherein the distance between the target electronic device and the ground is not less than 1 / 4 of the wavelength corresponding to the test frequency.

7. The electromagnetic environment effect testing device according to claim 5, characterized in that: The linkage device comprises a connecting rod, a sliding block and a guide rail; One end of the connecting rod is fixedly connected to the outer surface of the boundary deformation reverberation chamber; the other end of the connecting rod is fixedly connected to the slider; The slider is slidably arranged on the guide rail; The stepper motor is connected to the slider, and drives the slider to perform reciprocating motion on the guide rail according to a control signal from the controller.

8. The electromagnetic environment effect testing device according to claim 5, characterized in that: The electromagnetic environment effect testing device further includes: a power supply module; The power supply module is connected to the controller and the stepper motor respectively, and is used to supply power to the controller and the stepper motor.

9. The electromagnetic environment effect testing device according to claim 5, characterized in that: The photoelectric conversion module and the electro-optical conversion module are connected via optical fiber; and the host computer is connected to the field intensity meter via optical fiber.

10. The electromagnetic environment effect testing device according to claim 5, characterized in that: The transmitting antenna is a log-periodic antenna, a Yagi antenna or a horn antenna.

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